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acquired characteristics

acquired characteristics modifications produced in an individual plant or animal as a result of mutilation, disease, use and disuse, or any distinctly environmental influence. Some examples are docking of tails, malformation caused by disease, and muscle atrophy. The belief in the inheritability of acquired characteristics, proposed by the French biologist Jean-Baptiste Lamarck in 1809, was widely accepted at one time, but is now rejected. Geneticists have affirmed that inheritance is determined solely by the reproductive cells and is unaffected by somatic (body) cells.


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Question:Is there anything that has most or all of the the 7 characteristics of life but is not living. One example is a viruses but is that something else.

Answers:Nothing that is not alive has all of the characteristics of life. Viruses do not have all of the characteristics of life as viruses cannot reproduce by themselves. In addition, there are biologists that contend a virus is not made out of cells. Fire has most of the characteristics of life. The only thing it lacks is that, like a virus, it is not made out of cells.

Question:All living things share 7 main characteristics. The most important, defining characteristic is that all living things are made of ______In addition, all living things _____sexually or asexually. Living things also exhibit ________where they receive their traits from their parent(s). Living things also______to their environment. An example of this would be shivering in the cold._________is when a constant, internal environment is maintained in the organism. Living things also increase in size and complexity. This is called _______Finally, all living things have complex chemical activities that are responsible for energy production. This is called________ Keywords: reproduce, metabolism, growth and development, cells, respond, heredity, homeostasis.

Answers:All living things share 7 main characteristics. The most important, defining characteristic is that all living things are made of CELLS In addition, all living things REPRODUCE sexually or asexually. Living things also exhibit HEREDITY where they receive their traits from their parent(s). Living things also RESPOND to their environment. An example of this would be shivering in the cold HOMEOSTASIS is when a constant, internal environment is maintained in the organism. Living things also increase in size and complexity. This is called GROWTH AND DEVELOPMENT Finally, all living things have complex chemical activities that are responsible for energy production. This is called METABOLISM

Question:Can you give me an example of the 8 Characteristic of living things....like: 1. Living thing are made up of unit called cell. example: bateria 2. Living things reproduce example: human 3. They are based on a universal genetic code. example: ????????? Help 4. Living things grow and develop. example: ????????? Help skip 5 6. Living things respond to their enviroment. example: ?????????? HELP 7. Living things maintain a stable internal enviroment. example: ?????????? HELP 8. Taken as group, living things change over time. example: ?????????? HELP

Answers:Sure could.

Question:I need to find 10 characteristics and/or properties of water. I don't understand what my teacher means by characteristics/properties. Are there any good biology sites i can use for homework also? It seems like i go on here for help every night.

Answers:Characteristics and properties of water simply means a trait of water, like density, state of matter, abilities, etc. To help you out, here's a list of some characteristics and properties. -Water stores heat efficiently: Water heats more slowly and retains heat longer than many substances. For example, you know that when we sweat, we cool down. This is because the water lost through sweat carries the heat away from our bodies. -Water bonds to itself: This is called cohesion, where substances of the same kind are attracted to each other (water sticks to water, like drops of water on a plant). -Water bonds to other substances: Water can also bond to substances other than itself; this is called adhesion, the attraction between different substances. An example is how water drops stick to a window. -Polarity: Water is polar, which means that its water molecules have an uneven distribution of charge. Some parts of the molecules are negatively charged, while another is positively charged. Because it has an imbalance of charges, it is attracted to ions (which are charged molecules) and other polar molecules (uneven + uneven = even). -pH of water: The pH of pure water is neutral, or 7. When an acid (pH less than 7) dissolves in pure water, hydrogen ions are formed. When a base (pH more than 7) dissolves in pure water, hydroxide ions are formed. -Density of water: Water is less dense when it is frozen. This is why ice floats. -Increasing salinity decreases freezing point: The more dissolved substances in water, the colder it has to get before the water freezes. This is because there are more molecules to bond, and that the molecules interfere with the water molecules' bonding to freeze. -Surface tension: Water molecules "link" together at the surface of water to form a sort of "film". This prevents the surface of water from breaking easily. You can test this by floating a paper clip on water. Normally, the paper clip should sink because its density is higher than that of water; however surface tension keeps it up. -Nonpolar substances do not dissolve well in water: Like said, water is polar. Polar does not mix with nonpolar, and vice versa. For example, oil is nonpolar. When you put oil in water, you can see it forms "beads" or "circles" in the water. This is because when the oil goes into water, the water molecules are more attracted to each other than to the oil molecules. So, the oil molecules are shoved together. -Water freezes at 0 degrees Celsius (32 degrees Fahreinheit) and boils at 100 degrees Celsius (212 degrees Fahreinheit). Some helpful Biology sites are... http://www.biology-online.org/ - Has a forum and a ton of info http://www.scienceprofonline.org/ - Relatively new. Has a lot of info on different science subjects http://www.cellsalive.com/ - Award winning site with info! If you need more sites... http://www.kensbiorefs.com/index.html - list of sites (ordered by topics)